GM Truck Throttle Body Injection 4.3, 5.0, 5.7, 7.4 Engines 1991-1994 (using the 4L60-E Automatic Transmissions) GM added a computer command automatic transmission to the truck engines first and later years to their passenger cars. While the engines look the same and use most of the same sensors as the 1985-1990 engines, the older ECM's do not have the capability to control the electronic transmission. We incorporate the wiring necessary for the electronic transmissions. The CK truck ECM will be used in this application. The transmission types available were 4L60-E and manual transmissions.